EP 0406860 A1 19910109 - Method and device for producing conductive thin film-coated optical fiber.

Title (en)

Method and device for producing conductive thin film-coated optical fiber.

Title (de)

Verfahren und Vorrichtung zur Herstellung einer optischen Faser mit dünner leitfähiger Beschichtung.

Title (fr)

Procédé et dispositif de fabrication d'une fibre optique avec un revêtement mince conducteur.

Publication

EP 0406860 A1 19910109 (EN)

Application

EP 90112856 A 19900705

Priority

JP 9342990 A 19900409
JP 17497889 A 19890706

Abstract (en)

This invention provides a method and a device for producing an optical fiber which make it possible to measure the film characteristics of the inorganic thin films continuously and electromagnetically in non-contact therewith. Firstly, an optical fiber (16) drawn from a preform (15) is coated with a conductive thin film. Secondly, the optical fiber (17) is passed through a high-fregnency magnetic field to measure an eddy current generated in the conductive thin film in non-contact therewith so as to measure the film characteristics of the conductive thin film. The device for producing an optical fiber used for this invention comprises a fiber drawing furnace (1) to draw an optical fiber (16), thin film coating device (3), and film characteristics measuring device. The film characteristics measuring means (7-10) measure the film characteristics of the conductive thin film, based on a variation of an alternating current impedance of the detection coil (7) generated the optical fiber (17) is passed through the hollow interior of the detection coil (7).

IPC 1-7

C03B 37/027; C03C 25/02; G01B 7/10; G01B 7/12

IPC 8 full level

C03C 25/22 (2006.01); C03C 25/44 (2006.01); C03C 25/54 (2006.01); C03C 25/62 (2006.01); G01B 7/12 (2006.01)

CPC (source: EP)

C03C 25/223 (2013.01); G01B 7/105 (2013.01); G01B 7/125 (2013.01)

Citation (search report)

[A] CH 574879 A5 19760430 - SHEVINOV PAVEL ALEXANDROVICH
[A] US 4735856 A 19880405 - SCHULTZ PETER C [US], et al
[A] CH 564182 A5 19750715 - ZUMBACH ELECTRONIC AUTOMATIC
[A] EP 0174017 A1 19860312 - CSELT CENTRO STUDI LAB TELECOM [IT]

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 0406860 A1 19910109; EP 0406860 B1 19941005; AU 5865690 A 19910110; AU 640149 B2 19930819; CA 2020490 A1 19910107; DE 69013079 D1 19941110; DE 69013079 T2 19950323

DOCDB simple family (application)

EP 90112856 A 19900705; AU 5865690 A 19900703; CA 2020490 A 19900705; DE 69013079 T 19900705